Hoisting machine



Sept.' 16. 19.24.V

. F. WRIGHT HOISTING MACHINE r-iiel Jam. s, y1922 4 sheets-sheet 1 Figi] Sept. v16 1924. 1,508,492:`

, F. WRIGHT HoIsTiNG MACHINE Filed Jan. 3, 922 4 sheets-sheet 2 Sept. 16 1924.

F. WRIGHT HOISTING MACHINE Filed Jan. 3, 1922 4 Sheets-Sheet 5 LSOSAQZ Sept.1 16 1924. F. WRIGHT Horsfrmcjr MACHINE 4 Sheets-Sheet 4 Filed Jan. l:5, 1922` i. rying p Patented Sept. 16, 1924.

erica. i

FRED WRIGHT, OF NORTH CHICAGO, ILLINOIS, ASSIGNOB, BY MESNE ABSIGS, T0 STANDARD CONVEYOR COMPANY, OF .NORTH ST. PAUL, NNESOTA, l.A COR- PORATION 0F MINNESOTA.

HOISTING MAHIN 'To all lwhom t may concern.' Y

Be it known that I, FRED WRIGHT, a citizen of the United States, residing at North Chicago, inthe county of Lake and State of'Illinois, have invented a certain new and useful Improvement in Hoisting Machines, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specilication.l

' My invention relates to conveying machinery, and more articularl to an improved hoisting mac ine, especially adapted for stacking or tiering barrels, boxjes, packages, and the like.

In large commercial establishments, for example, and particularly in establishments devoted to the packing, shipping, storing or handling of barrels, boxes, packages of goods, and the like, it is a matter of material importance to provide for quickly and ediciently handling the goods and for piling or stacking the same in tiers in order to secure and utilize all of the space possible. While various machines have been provided for this purpose, the difliculties encountered and manual labor necessary, in connection with their operation arel well known.

It is an object of m invention to rovide a novel, simple an improved mac ine Afor stacking or tiering the goods expeditiously and with a minimum amount of manual labor. One of the provisions to this end is an improved power driven machine having an improved system of control. Another provision to the same end is an improved loading mechanism'for automatically loading the goods' upon the m'ovable carrier of the machine. A further feature is the provision of-an improved load caratform adapted for rotation about a vertlcal axis to receive or deliver the load at any desired angle, and a still further provision is an imlproved braking mechanism for automatical y arresting the movement of the movable carrier ofthe machine when the motor or other source of driving power is cut of.

In carrying out the above, I employ a motor suitab e for automatic control. for operating the movable' carrier of the machine, and I control the motor by the inove-A ment of the carrier, so that when the carrier is elevated to the desired point, the motor will be automatically cut ofi. The braking mechanism provided is automatically brought into operation atthis point to positive y arrest further movement of the carrier whlch 'equentl Aoccurs due to the momentum of the loa and the over-run pmitted in the usual electric motor. en the carrier is lowered or ermitted to descend to the desired. point, t e motor is again automatically cut o and the braking mechanism again brought into o eration tov positively arrest movement o the carrier. A driving connection is provided between the. motor and the loading mechanism, and this connection is so controlled by the movement of the carrier that when the carrier reaches the proper position, the loading mechanism operates to deliver the load thereto. .As the load is raised, the driving connection betweenithe motor and loading mechanism is maintained in engagement until the loading mechanism is properly reset to receive another load and is then released until the carrier again approaches the osition in which another package or loa is to be delivered thereto.

A further object of my invention is the provision of a machine of the class def scribed, which is simple, inexpensive and su erior in construction, simple, eective, sa e and reliable in operation and economically maintained.

A further provision of my invention is l an improved safety device .adapted to be automatically brou ht into operation to revent a sudden escent or uncontrolled ropping of the carrier in the event the xarlrier operating cable breaks, or other part Further objects and advanta es will appear from the following detai ed description and the claims taken with an inspection of the accompanying drawings, in which:

Figure 1 is a perspective Aview of a machine embodying my invention;

Fig. 2 is a rear end view of a machine embodying the controlling system of' the inventlon; l

. Fig. 3 is a side elevational View of the same; .f ,W

Y view of the carrier frame showin Fig. 6 is a fragmentary perspective view of the mechanism for controlling the driv ing connection between the motor and loading mechanism; y

Fig. 7 is a fragmentary front elevational a safety appliance for preventing sudden escent or 'uncontrolled dropping of the carrier; and

Fig.` 8 is a side elevational view ofthe same.

With reference now to the drawings the frame of the particular embodiment of the invention -selected for illustration comprises a base 5, preferably of angle iron and rectangular formation. One end of the base is provided. with a pair of supporting feet 6.. 'llhe opposite end is supported by suitable rollers 7. Journaled between the opposite sides at the rear end of the machine in a bearing 8 is a caster or roller 9. 'llhe bearing 3 is ivoted to the frame and provided with a andle 10. Normally, the feet 6 rest upon the door, with the caster 9 raised slightly therefrom. When the handle is lowered, the caster 9 is swung into engagement with the door, raising the feet 6 so that the machine may be transported to any desired place.

A pair of standards 11 mounted in upright position, between the opposite ends of the base 5 form an upright guide frame, up and down which a carrier l2 is adapted for movement. The standards 11 are preferably constructed of channel iron arranged with their inner channeled faces facing inwardly to receive the guide rollers or other cooperating portions of the carrier frame, usually arranged to travel therein. 'lhe upper ends of the standards 11 are connected by a'4 transversely arrangedstrut 13. Within their lengths, these members are braced by suitable bracing struts 14., arranged diagonally therebetween. The standards 11 may be ymadeup in sections pivotally connected through plates 15, as shown, if so desired, so that the upper portion of the guide frame may be folded or swung back and secured. rll`he details of the frame worlr so far described do not necessarily enter into the present invention, Pand may be varied in so far as the essence of the invention is concerned.

'lhe carrier frame 12 is provided at its lower end with a pair of horizontally eirtending arms 16. These arms 16 carry a circular track 17 about which a plurality of anti-friction rollers 18 vcarried by the platform 19 are adapted to travel. The platform 19 knot only moves with the carrier frame 12, but is mounted for rotation abbut example,

incense an axial stud 20, the upper end of which may be headed to hold' the rollers 1 3 carried thereb in proper cooperation with the traclz 17.. T e platform 19 is provided with a pair of rigid upright posts 21 and a pair of yieldable studs 22 normali projected vfrom the upper surface -of the pla springs l23 arranged between the platform and heads 24 at the outer ends of these studs as shown in Fig. 5. When a barrel 25, for is loaded upon the platform, as will beA hereinafter described, the yieldable studs 22 serve as a cushion for talring the load, which thenl rolls over against the rigid posts 21. The posts 21, the upper ends of which are finished to conform to the periphe of the barrel 25 serve as stops which, with the studs 22, which are thereupon spring up into engagement with'tlie opposite side of the barrel edectively hold the same against displacement from the platform during the hoisting operation. l/Vhen the barrel is elevated to the desired position, it may be delivered from the platform on to a pile, stack or conveyor at an desired angle simply by rotating the plat orm about the stud or post 20 to the desired position.

The transverse strut 13 carries a braclret member 26 in which one end of a vertical post 27 is journaled for rotation. The op posite end of the post 27 is ionrnaled in a bearing `carried by a channel iron 23 arran ed transversely across the standards 11.

"W it in its length the post 27 carries a' or axle 29, upon which a pulley or sheave 36 is mounted for rotation.

@ver thissheave or pulley 30 operate cable, rope or the like 31, one end of v. i b is secured to the movable carrier fra e 12. The opposite ends of the cable 31, after passing upwardly from the frame 12 and over the sheave 30, passes down and is secured. to a windin drum or windlass 32, the 33 of which is journaled in bearings 3dsecured to upright channels 35 and 36, mounted in position between the opposite sides ofl tform by coiled the base 5, the channel 36 at the rear eno of the base and the channel 35 between the standards l1. 'llhe channels- 35 and 36 are secured at their upper ends to trans r arranged frame members 37 across which a pair of longitudinally arranged rnc-tor car rying channels 38 are secured.

lllhe motor d0 is connected through chain l1 with a sprocket wheel l2 mounted u; transversely arran Ied shaft i3 jou the framing of t e machine. @on between the motor and shaft t3 course, be through cooperating of the chain Ll1., or in any other desired i ner, The shaft d3 carries a worm which meshes with'fand drives a gear wheel d5 mounted upon the winding drum i llass shaft' 33, so that upon stav motor, the drum 32 will be rotated e i., ,eea

a direction to eect a coiling or winds i: up

` the cable 31 thereupon and a conseqent 'or enlarged links 60 raising of the platform 19, or in a direction to (permit unwmding of the cable therefrom an a consequent lowering of the platform.

The motor 40 is connected to the :l f feed wires through leads 48 and to a controller 49 through leads 50. 'The controller 49 is provided with an operating 51 having a handle 52 at one end d connected at itis opposite end with the ends of a continuous cable, rope or the like 5B. One end of inner end of the arm 51. ""{lhe cable after passing up over a .eheave d'mounted upon one of the standards 11 passes down and is provided within its le dth with a short lengthof chain 55 trainedo over a sprocket wheel 56 mounted at the lower end of, the Y standard 11. The opposite end of the cable 53 extends up and is securedl tothe innerend of the arm 51. The movable carrier frame-12 is provided with an eye or lu 65 throui which the length 58 of 4the cabl 53 exten or at any rate, a lug carried by the movable frame 12 Amoves up and down alo the cable length 58 for cooperation with stops and 61 at the opposite ends thereof for a pur which will be hereinafter apparent. The sto s are pref-A erably secured in place by suitab e set screws 62 or the like, so that their position may be quickly and conveniently adjusted lor changed. A l

The controller arm 51 has t c posi-tions, i. e. an od position, an 11p-position into which it is moved to run the motor 40 in a direction to windv the cable 31 upon the drum 32 to reise the platform 19 and a .down position into which it is moved to run the motor inthe oposite direction to permit unwinding of Si cable from the drum with .a coent lowerin of the platform-or carrier ame. It wi now be apparent that by swinging the arm 51 into the u position, the motor 40 will be started and t e platform or carrier raised or moved upwardly until the lug 65 the stop whereupon the arm 51 will be 'automatically returned to the od position through the cable-53 and the motor stopped. Upon delivering the goods from 'arm 5l is swung into the down ition whereupon the motor is started and te platform or carrier permitted to descend until the lug engages the stop the arm 51 is automatically returned to the o position and the motor stopped. As alread poin out, the stops 60 and161 are a justable so that the motor automatically stopped at any des'.. int in the' movement of the carrier. To bring the carrier 12 to rest and prevent the motor 40 is )verruiming thereofwhen worm shaft due stopped or gp f. u of the the cable 53 is secured to the 7 arm 76,

Asprocket wheel 56 in the carrier, the

61 whereupon.

clutch tace 85 adapted for to the inertia of the motor, vmechanism which is automatically brought into action by the movement of the carrier. This mechanism comprises a drum 7 0 mounted upon one -end of the shaft 43 and a cooperating brake band 71 by means of which the desired" braking effort is applied thereto. One end of theV brake band to 'an arm or link' end of which link is connected'to anarin 73 pivoted within its lengthas at 74 and con-v nected atits' opposite end to a block or 5. The opposite end of the nected to one end of the link 75, the o pfosite end of which link is connected wit an pivomd eccentrically vat its opp site end to a disc 77 carried by the sproc wheel 56 for rotation therewith.

1t will `now be apparent that when the arm 51 is moved into the down position for example that the s rocket wheel 56 is rotated through the cain 55, moving the arm 76 through its` eccentric connection-with the disc 71 into the position shown in dotted lines. This movement of the arm 76 expands the band 71 from engagement with the drum by pulling the end connected with the link 75 ldotted lines and at the same time, swinging the arm 73 about its pivot -74' to push 'or force the opposite end of the band 'into the position shown in dotted lines. Upon descent of the carrier to the desired point, engagement with the stop 61 not only stops the motor 40, 'but at the same time, turns the a clockwise direction to swing the arms 76 and 73 back into the sitions shown in v iiake band into braking engagement with the drum 70 andarresting further movement' 71 is connected- 72 (Fig. 4)., the opposite full lines, contracting `the I provide a brakeA band 71 is conoety into the positionshown in' I 6i) upon movement of t' e cari with which the machine vshown in Fig. 1 is y equipped, the'end of the shaft 43 is provided with a vel ar 80 iixedly mounted therepon. e "L: gear 80 meshes with a vel gear'l loosely mounted upon a shaft 82 mounted lengthwise along one side of the machine in suitable bearing brackets 83. sleeve or collar Sdsplined for rotation with the shaft 82 and adapted to be' shifted l ong1- tudinally therealong is provided with a clutching en age ment with a cooperating portion of the vel gear 81 to connect the gear 81 and sleeve 84 'or' rotation tether.

at 100 and provided with a forked lower end embracing the collar and carrying suitable ment with the cooperating-space c vis connected through pins'which extend into a circuncierential groove therein. The upper end of the lever 86 is'provided with a handle portion -8'?. Adjacent the handle portion 87, the lever a linlr 88 with an arm 89 mounted upon a short shaft 90 (Fig. 0) journaled in a bearing 91 carried by' the trame oi the machine. The shaft carries a roller carrying arm 92 having a roller 93 at its yfree end for cooperation with a shoe member 94: secured to the carrier 12 ier movement therewith. rlhe lower end ci: the shoe member 94: curvedl outwardly as shown at 95. A. An arm 96 pivotally connected to the lever 86 at one end extends forwardly through a bracket member 97 carried by the trarne of the machine. A sprin 98 coiled about the arm 96 between the racket 97 and ay collar 99 carried by the arm tends to force the arm 96 rearwardly and thereby the lever 86 about its pivot V100 in a clochwise direction to disengage the sleeve 84% from the gear 81. Engagement oi the shoe 9a with the roller 93 moves the linlr 88 torwardly through the arm 89 swinging the lever 96 in a counterclockwse direction about its pivot 100, and the clutch base ot the sleeve 8d into clutching or drivin engagethe gear rllhe forward end i nally threaded as shown at 101. 'llhis externally threaded portion 101 engages in an internally threaded stud 102 adjustably base 5, so

` tion of the machine is adjustably secured upon an arm at 105 to the frame 5.

.wardly and is connected to anarm 107 fixed upon a shait 108 ar4 mounted in a length of channel iron 103 104i pivoted A li108 connecte at one end with the arm 10d extends fior at its opposite end the` iront ci the ranged transversely across 108 will be lrotated thatthe shaft by movement 105. Secured upon cach ci the opposite ends of the shaft 108 for rotation therewith is a loadin a 110. 'llhese arms 110 are provided with gradually inclined upper runnin surfaces 111, which surfaces teinate in arrel or load receiving adjacent the inner ends ci the arms.

are Fig. 1 and that the platform or carrier has-been raised or elevated to the desired position and the load delivered thereirom, the operaas follows:

rllhe controller a 51 is moved from the 'ed position (Fig. 4;) into which it is automatically moved when the desired elevation is reached as already pointed out, into the a eountercloclrwise direction oi the shaft 82 is erterd loading arms 110 into their ci the arm 10a about its pivot depressions 112 of a bell crank incense down position starting the motor d0 in the direction to permit unwinding oi the cable 8l 'with .a consequent lowering ci the carrier trame 12 and' heplati'orm 19 carried thereby. During this movement oi the carrier, the shoe 9a comes nto engagement with the roller 98 swinging the ever 88 in `a countercloclrwise dn tion 'about its pivot against the tension oi the spring 98. 'llhis movement ci the with the cooperating clutch i'ace 81. rllhe rotation ot the shalt the lever 84; in about its pivot through the threaded engagement with the stud 102. l

The arms up the gradual inclines ci which the barrel 25 has been rolled into the depressions 112 are thereupon swung upwardly littin the barrel 2. During this time, the plat crm 19 is moving into position to receive the barrel and upon reaching such position, the barrel is loaded ,or delivered by the arms 110 thereto, yieldable studs 22 serving-as a cushion for receiving the barrel which thereupon rolls over between the pairs oi studs 22 and posts 2l and is thereby maintained against displacement. en the lowcost position oi' he carrier is reached, the motor is stopped and the bralre applied as already descri l To elevate or hoist the barrel to the dethe controller `arm is then the motor engagement ofthe gear 82 thereupon set up swings sired position, moved up during carrier causes rotation of the ait 82 in the opposite direction, thereby returning the dott/ed line positions to receive another barrel which is then pl thereu Upon returning the arms 110 to'such position, upon the lever 86 is g about its pivot 100 in a cloclrwise directionby the spring 98 to disenga e the clutch through which the loader mec anism is driven. Upon reaching the desired elevation, the motor is automatiy' stopped and the brake automatically appied.' ,The barrel may he then delivered om the machine at any desired simply by rotating the platform 19 the studs or postsf20.

sudden descent or unconoithecarrier in the event angle about To prevent a trolled drop ci the br s ing ci thecable 31 or Ifailure oi another part ci the machine, ll provide a safety device. comprising a shaft (Figs. transversely the carrier frame 12 in be 121. The end 122 oi the cablel is connected to one arm lever 128 lined upon vthe lever 80 moves the 4clutch tace ci the sleeve 8d into driving the'shoe 941 is moved l out ci engagement with the roller 98 whereit 120 intermediate its opposite ends A coiled sp f 124 secured at .one end to the er e :rrr- 0 the bell crank lever 123 extends and is secured-at its opposite end to a frame .fornire 125 ofthe carrier frame 12. .The

along which the Ote ends ofthe shaft 120 carry cams 126 ha serrated edges 127v adapted for ennt with the upright standards 11 frame 12 is movable.

It is believed that the operation of the safety applianoeisobvious. AIn the event th@ Cill@ 31 bee the spring 124 and l' cams 126 vcarereby, forced into secnreenga ment with the upright standards 11 and #sgg carrie? che/ehm aga the. necessary repair is made. Lt should be noted that when the serrated edges of the earns 126 are forced the uprights 11 bythe spring 124 any ten-4 dy '12 l and with ment with eration with into engagement with toward further increase the geant, and there er droppin I oondu tests and find that with a mae :a c 1g the features' of my invention, e'xcel'y heavy loads, barrels ofoil weighing from tive to six hundred pounds, for explo, may be handled ex tiously a um of manual aber. Whiie I have described my invention in t; ion with the details of particular ein- '1w il donot intend thereby to limit descent of the carrier cureness of this en-4 vention to such details, as I am aware and conplate that modificationv and changes-y be m in adapting the in vention for use nndervarious conditions and in dido relations without departing from the essential aspect of the invention, and i A l Fwn the a pendd claimsthaccordmgy. or enamp e, em y' e principle of .the me: mechanislhlgm 'a device for deliverin the go from the machine when the d elevation is reached is con,-s tempiated.

1 in combination, a load carrying surface, a pair of rigidl sto members project#- lng from said surface an adapted for coopo one side of the load, va pair of yieldable studs for receiving the load uponvery ci the mme to seid surface, .said ming thereafter projected into engagev the op osito side of the loadrte fr: displacement.

2;. In a machmeof the class gunde e, e rrier 4moarable therealong, e conn with the carrier and adapted for cooperation with said guide "ai, to i the carrier against movement, spring means for sw' g said cam into .co operation with the guide frame and means sf-:irreale `ivith, the er for moving the' 9 'erin s y Tes' rsr d` shaft, a coiled cooperation with the for example, the shaft further descent until f y positively hold thesprin means and thereby the swin'ng cam out o engagement with the guide e.

3. In a machine of the class described,ja guide frame, a carrier .movable therealong, a rotatable shaft carried by the carrier, a cam on said shaft adapted for cooperation with the guide frame to lock the carrier against movement, a bell crank on said spring connected with one crank to' swing the cam into' ide frame, ai cable counted with the ot er arm of said .bell cr to move Athe carrier, said `cable normally restraining said spring and thereby the cam out of engagement with the guide frame.

d. In a machine of the class described,` a carrier, a driving'motor arm of said bell vertically movable therefor, a threaded shaft adapted for driving connection with said -motor and means for delivering a load to the carrier, said loadin means being connected with said shaft t ou h an internally threaded member gogra le with the threaded portion of the l In a machine of the class described, a vertically movable carrier, a driving motor rotatable vin one direction to. raise said carrier and in theopposite direction to permit descenson of the carrier, a shoe member carried by the carrier, a threaded shaft, loadin means connected with said shaft throug a threaded member coo rable' therewith, means cooperable with sold shoe member upon movement f the carrier inl one direction to connect the motor and threaded shaft and thereby' deliver a'loadtothe carrier and to vreset means upon movement opposite direction. l

a machine of the class described, a vertically movable carrier, a drivin motor therefor, meansl for delivering a loa to the carrier, a driving connection between said loading means and the motor, sprln means for disengaging said connection an means carried lby the carrier for engaging said connection against said'spring means.

i. `ln a machine of the class descrxd, a verticali movable carrier, a motor, a controller t erefor, tion between said drum and said motor, a denible element connected with the carrier and with said winding drum, a continuons denible element having connection with the controller, element, means for actuating the exible ele-. ment to control the motor and said brake means, means for delivering -a load to the carrier, and a driving connection between said means and the motor, said connection being` controlled by the movement of the carrier.

8. in a machine of theclass described, a supporting base, a frame'carried thereby, a

said loading of the carrier in the a wing drum, va connec- I brake means connected with said los A CB A A y l incense drum shaft arranged wit said frame, a ible element extending vertically along the second shaft arrand Within the frame subguide frame,'said element being actuated by stantially normal said drum shaft, a driving the movement; `of the load carrying plat connection between said shaft, means for form and trained over and supported by a e' driving said second shaft, a shaft arranged wheel adjacent the base of the guide frame t@ longitudinally along the machine, a drivin@ and in driving engagement with said supconnection between one end of said second porting wheel to actuate same upon acidicy shaft and said last named shaft, and-an artion of the flexible element, means connectedrestin device cooperable with the opposite withand actuated by said sup orting wheel io end o said second shaft, for arresting movement of t e carrier, a KD 9. ln a machine f the class described, a winding drum having a flexible. winding frame including a supporting base and an element connected between it and the platupright guide rame, a load carrying latform, means for turning the drum, and a form mounted for movement up and sovvn controller for said turning means supported it the guide frame, means for moving the platlin the path of actuation of the continuons G@ form and means -having driving connection dexible' element and connected directly with the platform moving means for dethereto. to control the turning means by the livering a load to the platter, said drivmovement of the platform. ing connection resetting the loading means lt. ln a machine of the class described, a ac after theloa- 10. ln a machine of the class described, a fw ght guide frame, a load carrying plat frame includin a supporting base and an form mounted for movement up and dorm upright guide rame, .a load carrying platthe guide frame, a continuous derible ele` form mounted for'movement up an wn ment extending vertically along the guide t' operation. ame including` a, supporting base and an the guide frame, a driving motor for movframe, said! element being actuated by the @il ing the platform, means havin driving movement ,of the load lcarrying platform connection with the motor for de ivering a and trained over and suipported by a wheel load to the latform, said driving connecadjacent the base of the guide frame and tion being -napted for resetting said loa-d in driving engagement with said supporting delivering means, and means automatically wheel to actuate said wheel upon mtuation controllin said connection by the move` Aof the denible element, and means connected ment of t e platform to impart a loading withand actuated by said supporting wheel operation to said load delivering means in for arrestingmovementof the carrier. A the downward movement of the platform 15. lin a machine of the class described, and a resetting operation to said loading a frame inclng a sup means in the upward movement of the platupright guide frame, a oad carryin platform. form mounted for movement up' and downll. lin a machine of the class described,a the guide frame, a continuous denible ele frame includin a supporting base d an ment extending vertically along the guide 4o upright guide ame, a load carryingplatframe and actuated by the movement of l form mounted for movement up an own the load carrying platform, -a winding drum the guide frame, means for oving the load having a' dexible winding elementconnected carrying platfo, an arm pivoted to the between it and the platform, means for supportin. fre and adaptedfor `deliverturning the dr, anda controller for said l S ing a loa to the platfo, and a link conting means. supported inthe path of necting said .arm with the platform moving actuation ofthe continuous dexible element .means for operatv said load delivering and connected directly thereto to control the' arm therefrom. tug means by the movement of the plat- -l2. l'n a machine ofthe'class described, a form. @t frame includin a surting base and an lt. lin a mace of the class described, a A upright guide ame, a load carrying plat load carg platform, a yieldable stud for form mounted for movement up and own recei the oad upon delivepy of same to the ide frame, a shaft arra transe the latform, and means for projecting said verse y across the supporting ase, a pair stu tinto cooperation with the load to hold of arms xed on sai -haft for irritation se 'aga `displacement from tlieplatp therewithandadapted for delivern a load "form to the latform, a pivoted arm, an a linh il. lin a machine cf'tlieV class described, connecting said arm andfsaid shaft to t a load cag platform, a. yieldeble'stud se and imparta loading operation'to the for receig theload upon delivery of t@ .arms non actuation of the pivoted a same to the platform, meansforA rejecting it. In a me of the class dribed said stud into .cooperation with t e load to -a fmeinclu A a support base an hold sea :rw displacement from the an upright de 'e 1 o load ceplatform, an a rigid cad engaging stud.. latform mounted for movement up, an i8, linl a mae of the .class described, t5 ovm the gmde framesa continncns den e frame inclnchng a supportingbase and m orting base and an "ll control of the Y frame includin 'Lausana' upright guide frame, a continuous iexible Aelement extending vertically along the guide frame, a load carrying platform mounted for movement u and down the uide frame and having an a utment moveab e along the exible element, and an abutment 'on the flexible element engageable with said first abutment to control the movement of the platform, said last abutment being adjustable, to permit adjustment of the point of Elatform.

19.v In a mac platupright guide ame, a load carryin form mounted for movement up an down one side of the guide frame, a generally rectangular frame on the'otherside ofthe 'guide frame, a power shaft for hoisting the platform, a driving sprocket on said shaft, a second shaft, va. sprocket on said second shaft, a driving chain trained over said first and second sprockets totransmit the driving efort'ofv the power shaft to said second shaft, a driving member also mounted on said second shaft a drum shaft journaled ine of the class described, a a supporting base and an in the generally rectangular 'frame and a a shaft journaled in the generally rectangular frame, a (sprocket on said last shaft, a driving chain trained over said first and -second sprockets to transmit the driving effort of the motor to said last shaft, a driving member also lmounted on said last shaft, a drum shaft journaled in the generally rectangular frameand a gear mounted on. the drum shaft and meshing with said -drivmember.

in In witness whereof, I hereunto subscribe my name this 21st day of December, 1921.

l FRED WRIGHT. 

